Sectional boiler.



No. 760,548. PATENTED `MAY 24, 1904. P. J. MULVEY.

SEGTIONAL BOILER.

APPLIGATION FILED Nov.5,119os.

4 'N0 MDDEL. 2 SHEBTB--BBEET 1.

No. 760,548. PATENTED MAY 24, 1904. P. J. MULVEY.

SECTIONAL BOILER.

APrLmATroN FILED Nov. a, 190s.

No MODEL. a saure-amm z.

In, a... A! .4 14 '1111111 UNITED STATES Patented May 24, 1904.

PATENT OFFICE.

PATRlOK J. MULVEY, OF BIRMINGHAM, ALABAMA, ASSIG-.NOR OF THREE- FIFTHSTO EDVARD H. PIGUE, OF NASHVILLE, TENNESSEE.

sEo'rioNAL BolLEn.

SPECIFICATION forming partof Letters Patent No. 760,548, dated May 24,1904.

Application filed November 5,1903. Serial No. 179,970. (No model.) y

To (if/ZZ whom, it may concern: r

Beit known that I, PATRICK J. MULVEY, a citizen of the United States,residing at Birmingham, in the county of Jefferson and State of Alabama,have invented new and useful limprovements in Sectional Boilers, ofwhich the following is a specilication.

My invention relates to improvements in y sectional boilers for use inconnection with 1o steamand hot-water heating systems, and has for itsobject to increase the eiliciency oi' the boiler by a novel constructionand arrange-V ment of parts which kwill cause the products of combustionas they passito the exit-liuc to exert their influence against thoseparts ot the boiler where they will promote the proper circulation ot'the water and act most rapidly to superhcat or vaporize it.

With these objects in view I provide the several sections with abuttingwater-legs forming the side and top walls of' the boiler and withwater-arches communicating `with the side and top portions oi' thewater-legs and provided with deflector-flanges,which direct 2 5 theproducts of combustion after they have passed up between and throughsaid arches against the center of the top oi' the boiler, so that thegreatest heat is applied directly where it can be best utilized.Theproducts are then 3o directed toward either side of the boiler andpass over the water-arches and downwardly into lues formed between thearches and side 4walls of the water-legs, through which they pass to thestack. l

My invention comprises various other improvements in the constructionand arrangements, which will be hereinafter more particularly described,and pointed out in the claims,

reference being had to the accompanying drawings, in which- Figure l isa front elevation of the boiler. Fig. 2 is a transverse vertical sectionthrough the boiler along the line fr a' of Fig. 3. Fig. 3 is alongitudinal horizontal section through the boiler along the line 5:/ i/of Fig. 2. Fig.` iis a plan view of one of the sectional damperplates.Fig. 5 is a sectional view through a series of these damper-plates,showing the damper therein. Fig. 6 illustrates the interter oil thecombustion-chamber 21.

locking top ends of the sections. Fig. 7 is a 50 perspective View of ahalf-section;

Similar reference-numerals refer to the same parts throughout theseveral figures.

The boiler, as illustrated, comprises a hollow front or end section 1,having the ash-pit door 2, fuel-'door 3, and {ine-doors f1. Between thefront and the back end section 5 areA four intermediate and independentsections, which may consist of integral castings, but are preferablymade in two pieces 6 and 7 similar in 60 shape and provided withoverlapping flanged ends 8, with transverse central openings andinterposed gaskets or slip-nipples 9 to insure watertight connectionsbetween said open ings, so that they collectivelyconstitute a continuouscylindrical chamber 10 for water or steam from front to rear ot' theboiler. An upperi'astcnng-bolt 11 for the sections passes centrallythrough this chamber and is engaged by nuts 12, which lock the partssecurely together.

The sections 6 -and 7 are hollow castings formed with water-legs 13,which constitute the inner side and top walls of the boiler. The outersides of these sections t'orm the outer 75 walls of the boiler. I1nlet-pipes 14 for the water-supply enter the lower ends of thewaterlegs, where they are enlarged to Jform, with the adjoiningsections, acontinuous chamber 15. These pipes 14C preferably enteralternate sec- 8O tions on each side of the boiler. The extensions orshoulders 16 at the lower end of the sections have openings throughwhich thelower connecting-bolts 17 pass for securing the sectionstogether. By providing one side of each section with a rib 18 and theother side with a complementary groove 19 in which the rib oi' theadjacent section engages the parts will form close interlocked jointsand hold securely together. The water-legs ot' the parts G and 90 7 ofeach section' are formed of equal width throughout and provided withwater-arches 20 of less width, which project inwardly to a pointadjacent to each other and the vertical center ot' the boilerimmediately over the cen- 95 These arches comprise a lower substantiallyhorizontal hollow leg 22, communicating with the water-leg 13 and withtwo vertical legs 23 and 24, which are connected at their upper ends bya leg 25. This leg 25 also communicates with the top of water-leg 13 bya tube or passage 26. All these parts of the water-arch being of lesswidth than the sections 6 7 permit the products of combustion fromchamber 21 to pass freely between and around them, so that they areexposed directly to the heat on all sides. In order to direct theseproducts so that they will exert their greatest influence against thetop of the boiler, I provide the outer edges of members 25 and 26 andthat portion of 22 between 26 and the water-leg 13 with side flanges 25and 22, respectively, of equal width with the sections, so that when inan assembled position they abut against each other and formdeiector-Walls which cause the products to pass upwardly through legs22, 23, and 24 until they reach the leg 25, when the upper deector-anges25a cause them to pass around the inner end of the arch and impingedirectly against the center of the top of the boiler. At this point theinner ends of the top sections of the water-legs 13 meet veach other,forming a flat continuous inner top surface, and are provided witharched verticallydisposed extensions 27, forming the steamdome, whichcommunicate with the chamber 10. According tothe construction describedthe water circulates from the passages 15 upwardly through theWater-legs and branching therefrom through the legs 22, 23, and 24 andthe tube or passages 26 to the top water-leg and thence upwardly throughthe extension 27 to the common chamber 10. The water will berv graduallyheated as it rises until it reaches the center of the top water-legs,when it will be at its maximum heat, and with a view to directing theproducts of combustion so that they will exert the greatest influence atthe point where the water is most highly heated they are caused by thedeflector-plates to pass straight to the under side of the top of theboiler, Where they transform the water into steam or superheat it muchmore rapidly than if the heat were indirectly applied to the water orrst to the cooler portion of the water-legs, as is the case in manyboilers. The heated gases are deflected along under the top water-legsand above the legs 25 of the water-arches and around the passages 26 andenter the side iiues 28 and 29, formed by the legs 24 and their abuttingflanges 24XL and the side walls of the water-legs 13 above iange 22E.rIhese iiues lead longitudinally of the boiler, and the products ofcombustion pass through them and enter the branch pipes 30, leading fromthe rear end of the boiler to the stack. By this arrangement it will beseen that the outer or cooler sections of the boiler are subjected toproportionately less heat, which will cause the water to circulatenaturally from the water-legs through the arch toward the chamber 10,which represents the steam-arch, and to return through the top and upperside waterlegs 13.

In order to control the flow of the products of combustion and regulatethe boiler, I pro-l vide a series of damper-plates 31, which rest onlugs 32 on sides of water-legs 24 and 13 near the top of the iiues 28and 29. These damper-plates conform in shape with the opening betweenthe said water-legs and are so arranged that when the boiler-sectionsare assembled they form continuous plates provided with openings 32 atregular intervals, over which the dampers 33 are moved by rods orhandles extending through the front section of the casing. The dampershave dependent lips or tongues 34, which enter these openings 32 andserve the purpose of cleaning them of soot or sediment and regulatethethrow of the dampers. By moving either damper to its closed position oneside of the boiler will be practically out of operation and the heatingcapacity of the boiler greatly reduced. It will be noted that when theproducts of combustion are directed toward one side of the boilerexclusively there will be free circulation of water in the arches 2Othrough the legs 23, 25, 24, and 22, which will prevent any unequalheating of the water in the water-arches.

By directing the products of combustion from the lire-chamber 21directly to the center of the top of the boiler and then forcing them todivide and pass along the inner walls of the boiler formed by thewater-legs 13 until they reach the iiues 28 and 29, through which theypass to the stack, I secure from them their greatest heating capacitywithout interfering with the draft, and at the same time the mostnatural and effective circulation of water results.

The grate-sections 35, which rest upon the bars 36, may be of anydesired construction, and these bars may be also used to support theseveral sections of the boiler.

The back 5 of the boiler is hollow and constitutes the usualwater-jacket or end, while the front is also formed hollow in the usualmanner. Suitable well -lnown connections IOO lIO

between the front and back and the circulating-sections are formed.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is-

. 1. A steam boiler or heater consisting of sections joined and formedwith abutting side and top water-legs, water-arches communicating withsaid side and top sections of the water-legs and forming with saidsections deflecting-passages for the products of combustion, which forcethem to pass directly to the center of the top water-legs and then oversaid arches and enter an exit-flue formed between said arches and theside water-legs.

2. A steam boiler or heater, a series of joined sections serving aswater-legs, series of inwardly-disposed projections through which thewater circulates from said legs, and delector-partitions formingpassages lengthwise of the boiler leading between and over saidprojections and said passages opening into a longitudinal flue on eachside 0i the boiler formed between said projections and the sidewater-legs.

3. In a sectional boiler a series of transversely-disiiosed sections,each of which cornprises side and top water-legs and inwardlydisposedwater-arches connected to each side water-leg and the top water-leg,said arches being oli' less width than said water-legs and provided withdeflector-ilanges which direct the products of combustion between andover said arches, and form horizontal exit-[lues between the iiangedsides of said water-arches and the adjacent side water-legs.

4. ln a sectional steam-boiler, a series of transverselydisposed watersections formed in two parts suitably connected at the top ot' theboiler and communicating' with a horizontal chamber, and withwater-arches which project inwardly to a point adjacent to each othernear the vertical center' of the boiler, abutting flanges on the top andouter side of said water-arches which form with the top and sidewater-legs transverse horizontal passages and side liues, and means toregulate the iiow oilE the products or' combustion from said passagesinto said lues.

5. In a sectional steam-boiler, a series of two-part sections providedwith overlapping communicating shoulders at their upper ends and formedwith side and top water-legs, an inwardly-disposed water-archcommunicating' with the water-leg oiE each part and .formed withhorizontal and vertical communicatingl legs and deiiector-flanges, onsaid horizontal and vertical legs ot' said arches forming longitudinalcentral ,top and side Iiues and directing the products of combustionagainst the longitudinal center of the top of the boiler before theyenter said flues.

6. In a sectional boiler, outer water-legs and inwardly-disposedwater-arches communicating with said legs, top and side horizontal iiuesformed between said arches and said legs, and horizontal damper-platesforming a continuous apertured partition between said top and sidefiues, and dampers opening' or closing said aperture.

7. ln a sectional boiler, a series of joined sections comprisingwater-legs forming the casing and inwardly-disposed water-arches formingside and top horizontal passages between them and said casing, andsectional damper-plates of equal width with said sections and disposedto form a continuous partition, and a damper movable over saidpartition.

8. In a sectional boiler, a series of sections formed with water-legsconstituting the casing oi' said boiler, inwardly-disposed waterarchcsleading from inner sides of each seetion, said water-arches beingarranged relative to each other, so that the products of combustion passbetween and through them and are deflected by abutting portions so thatthey pass between the inner and upper ends oi? the oppositely-disposedarches at a point adjacent to the central portion oi? a top water-legand thence under the top ot the boiler before passing' to their exitiiue or ilues.

9. In a sectional boiler, a section comprising side and top water-legsand oppositelydisposed water-arches communicating therewith and arrangedrelatively to the arches of adjacent sections so that the products ot'com bustion pass between and through said arches directly to the topwater-legs and thence over the tops olil said arches and enter fluesformed by the rear Vwalls of said arches and the sides of the boiler.

10. In a sectional boiler, a section comprising side and top water-legsand a water-arch 'formed or' fou-r communicating water-legs whichconstitute a substantially rectangular' frame, connections leading fromthe lower and upper portions ol2 said water-arch to a side and topwater-leg respectively oit' said section and a flange leadingl aroundthe two water-legs of the arch adjacent to the side and top water-legs.

ll. In a sectional boiler, sections comprising side and top water-legs,water-arches, and ianges on said arches which abut and form alongitudinal central liuc which directs the products of combustionbetween said arches and against the center oil said top water-legsbefore they have access to said side waterlegs.

PATRICK J MULVEY. Witnesses:

H. M. IIAnToN, IV. J. GILMoRn.

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